Konstadinos ("Kostas") Zalagitis (Greek: Κωνσταντίνος "Κώστας" Ζαλαγκίτης, born 13 December 1980) is a retired Greek triple jumper.
He also competed at the 2000 Olympic Games and the 2005 World Championships without reaching the finals.
His personal best jump is 17.43 metres, achieved in June 2002 in Chania.
In Greece only Dimitrios Tsiamis has a longer jump.
This biographical article relating to Greek athletics is a stub.